Compression dry bags supplier wanted

Hi
I'm a newbie round these parts and have just started importing. So far I've kind of stuck to the video game accessories which seems to be going good.

However I'd really like to find a wholesale supplier of Compression Dry Bags,aka dry sacks. As its currently near impossible to get a good quality one here in New Zealand. I've checked out all the suppliers under tramping but have had no luck, anybody got any ideas who to check out next?

For those not sure a drysack is basically a water proof bag and the sort I'm after have a system that allows air to escape.